Search results
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Estimates of natural and fishing mortality from toothfish mark–recapture and catch-at-age data at South Georgia
bias, using simulated data. The results confirm earlier findings, with lower estimates of natural and ... mark-recapture models of this type. Given the increasing number of releases and recaptures in all the ... current tagging programs, we suggest that this type of modelling approach can serve as both a useful tool ... estimates of the exploitation rate predicted by the full assessment models, currently being implemented ...
Meeting Document : WG-FSA-06/54 : Author(s): R.M. Hillary and D.J. Agnew (United Kingdom)
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2006 assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity
Abstract: The ASPM assessment of the Prince Edward Islands toothfish resource by Brandão and ... updated to take account of further catch, GLM standardised CPUE and catch-at-length information that has ... % of its average pre-exploitation level in terms of spawning biomass. It is suggested that it would be ... prudent to restrict annual legal catches to 500 tonnes or less, unless a large proportion of the catch is ...
Meeting Document : WG-FSA-06/58 : Author(s): A. Brandão and D.S. Butterworth (South Africa)
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Results of the scientific research survey in CCAMLR Subarea 88.3 in the 2004/05 season
are presented. While ice conditions prevented the successful completion of the full research plan as ... , icthyoplankton sampling, toothfish tagging and biological sampling of toothfish and other species completed. Pre ... -recruit D. mawsoni were caught at much greater depths than occurs in the other Subareas of Area 88. This ... surprising lack of biodiversity in the De Gerlache Seamount study area. While the results of this research ...
Meeting Document : WG-FSA-05/53 : Author(s): G. Patchell (New Zealand)
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Estimating penguin populations using image analysis of colour aerial photography
Abstract: Penguin populations are potentially sensitive indicators of change in the Antarctic and ... colonies, for colonies in areas of complex terrain, or for colonies where ground access is difficult ... of a computer based image analysis of digitally scanned colour aerial photographs of macaroni penguin ... : Estimating penguin populations using image analysis of colour aerial photography Approval: Approved ...
Meeting Document : WG-EMM-02/34 Text : Author(s): P.N. Trathan (United Kingdom)
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Preliminary analysis of seabird by-catch in the South Georgia icefish fishery
Abstract: We conducted a preliminary analysis on the numbers of birds caught as a bycatch in the ... 92 birds were caught, principally black-browed albatross and white-chinned petrel, with 93% of the ... factors affecting the probability of a haul catching birds, but no significant factors were found that ... could explain the number of birds caught. Differences in the numbers caught in the last three years also ...
Meeting Document : WG-FSA-01/30 : Author(s): D.J. Agnew, N. Ansell and J.P. Croxall (United Kingdom)
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Extending ecological monitoring to underpin the development of feedback management approaches for the Antarctic krill fishery
fishery. Such a management approach may also require the development of a new or extended monitoring ... of the issues associated with the development of a new monitoring programme, outlining one possible ... each. We propose that CCAMLR consider the merits of different approaches over the next two years, so ... that it can agree a way forward and make best use of the recently established CEMP Fund. Author(s ...
Meeting Document : WG-EMM-12/04 : Author(s): P.N. Trathan (UK), H.J. Lynch (USA), C. Southwell (Australia), P.T. Fretwell (UK), G. Watters (USA) and N. Ratcliffe (UK)
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Developing a strategy for coordinated research leading to achievement of the CCAMLR objectives for Antarctic toothfish (D. mawsoni) in Area 48
the objectives of the Commission, across the whole of Area 48. Co-ordinated by WG-SAM and/or FSA, a ... high level strategic approach will allow the formulation of research hypotheses and associated ... and results can be subsequently evaluated. A time schedule, in the form of a project plan with ... meeting its objectives for management of the Convention Area. Author(s): C. Darby and M. Söffker Title ...
Meeting Document : WG-FSA-17/54 : Author(s): C. Darby and M. Söffker
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Responding to the emerging threat of microplastics in the Southern Ocean
microplastics in several different regions of the Antarctic. Microplastics could have negative effects on the ... of laundry water. ASOC and COLTO further recommend that: All operating vessels and research stations ... consider ways to limit potential sources of microplastics and microfibers discharged through grey or ... the amount of microplastic fibers entering the ocean. CCAMLR Members and Observers, as well as SC ...
Meeting Document : SC-CAMLR-XXXVII/BG/18 : Author(s): Submitted by ASOC and COLTO
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Stock assessment of the Patagonian toothfish (Dissostichus eleginoides) at South Georgia
eleginoides, in the vicinity of Shag Rocks, South Georgia. Assessment of this stock is not possible by ... conventional methods because the bulk of the adult population may be dispersed over a wide area in deep water ... whereas the Shag Rocks’ shelf may be a nursery ground for juveniles. An assessment of the stock has been ... stock. Author(s): I. Everson (United Kingdom) Title: Stock assessment of the Patagonian toothfish ...
Meeting Document : WG-FSA-91/20 : Author(s): I. Everson (United Kingdom)
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Size selectivity of the RMT8 plankton net and a commercial trawl for Antarctic krill
Abstract: Net selection of the scientific RMT8 plankton net and a commercial sized pelagic trawl ... underrepresented in the RMT8. For the commercial trawl with a liner mesh size of 12mm the length classes smaller 35 ... and 45 mm are undersampled, probably depending on the size composition of the catch. A preliminary ... study on krill damaged during trawling operations indicates an effect of trawling duration and total ...
Meeting Document : WG-EMM-07/28 : Author(s): V. Siegel (Germany)